/ 
PICA-Data-0.24
River stage one • 1 direct dependent • 1 total dependent
⭐ Starred 6 GitHub stars
/ PICA::Data

NAME

PICA::Data - PICA record processing

SYNOPSIS

  use PICA::Data ':all';
  $parser = pica_parser( xml => @options );
  $writer = pica_writer( plain => @options );
 
  use PICA::Parser::XML;
  use PICA::Writer::Plain;
  $parser = PICA::Parser::XML->new( @options );
  $writer = PICA::Writer::Plain->new( @options );

  while ( my $record = $parser->next ) {
      
      # function accessors
      my $ppn      = pica_value($record, '003@0');
      my $holdings = pica_holdings($record);
      my $items    = pica_items($record);
      ...

      # object accessors (if parser option 'bless' enabled)
      my $ppn      = $record->{_id};
      my $ppn      = $record->value('003@0');
      my $holdings = $record->holdings;
      my $items    = $record->items;
      ...

  }

  # parse single record from string
  my $record = pica_parser('plain', \"...")->next;

DESCRIPTION

PICA::Data provides methods, classes, and functions to process PICA+ records in Perl.

PICA+ is the internal data format of the Local Library System (LBS) and the Central Library System (CBS) of OCLC, formerly PICA. Similar library formats are the MAchine Readable Cataloging format (MARC) and the Maschinelles Austauschformat fuer Bibliotheken (MAB). In addition to PICA+ in CBS there is the cataloging format Pica3 which can losslessly be convert to PICA+ and vice versa.

Records in PICA::Data are encoded either as as array of arrays, the inner arrays representing PICA fields, or as an object with two fields, _id and record, the latter holding the record as array of arrays, and the former holding the record identifier, stored in field 003@, subfield 0. For instance a minimal record with just one field 003@:

{
  _id    => '12345X',
  record => [
    [ '003@', undef, '0' => '12345X' ]
  ]
}

or in short form:

[ [ '003@', undef, '0' => '12345X' ] ]

PICA path expressions (see PICA::Path) can be used to facilitate processing PICA+ records.

FUNCTIONS

The following functions can be exported on request (use export tag :all to get all of them):

pica_parser( $type [, @options] )

Create a PICA parsers object. Case of the type is ignored and additional parameters are passed to the parser's constructor:

pica_writer( $type [, @options] )

Create a PICA writer object in the same way as pica_parser with one of

pica_path( $path )

Equivalent to <PICA::Path-new($path)|PICA::Path>>.

pica_values( $record, $path )

pica_value( $record, $path )

pica_fields( $record, $path )

pica_holdings( $record )

pica_head2s( $record )

pica_xml_struct( $xml, %options )

Convert PICA-XML, expressed in XML::Struct structure into an (optionally blessed) PICA record structure.

ACCESSORS

All accessors of PICA::Data are also available as "FUNCTIONS", prefixed with pica_ (see "SYNOPSIS").

values( $path )

Extract a list of subfield values from a PICA record based on a PICA path expression.

value( $path )

Same as values but only returns the first value.

fields( $path )

Returns a PICA record limited to fields specified in a PICA path expression. Always returns an array reference.

holdings

Returns a list (as array reference) of local holding records (level 1 and 2), where the _id of each record contains the ILN (subfield 101@a).

items

Returns a list (as array reference) of item records (level 1), where the _id of each record contains the EPN (subfield 203@/**0).

CONTRIBUTORS

Johann Rolschewski, <rolschewski@gmail.com>

Jakob Voss <voss@gbv.de>

COPYRIGHT AND LICENSE

Copyright 2014- Johann Rolschewski and Jakob Voss

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

  • PICA::Record (deprecated) implemented an alternative framework for processing PICA+ records.

  • Use Catmandu::PICA for processing PICA records with the Catmandu toolkit, for instance to convert PICA XML to plain PICA+:

    catmandu convert PICA --type xml to PICA --type plain < picadata.xml